Nucleic acids encoding lettuce big-vein virus proteins and utilization thereof

ABSTRACT

The coat protein of lettuce big-vein virus (LBVV) was purified from highly purified LBVV, and its partial amino acid sequences were determined. An RNA encoding the coat protein of LBVV was cloned by polymerase chain reaction using primers designed based on the determined amino acid sequences information, and its primary structure was elucidated. Moreover, the present inventors succeeded not only in isolating RNA molecules of a plurality of LBVV-encoded proteins by carrying out 3′RACE and 5′RACE using primers designed based on the resulting sequence information, but also in determining their primary structure. Similarly, an RNA encoding polymerase of LBVV was also successfully isolated, and its primary structure was determined. It was found that the use of these made it possible to produce lettuce resistant to LBVV and to diagnose infections with LBVV.

TECHNICAL FIELD

[0001] The present invention relates to nucleic acids encoding lettuce big-vein viral proteins, proteins encoded by the nucleic acids, and their production and use.

BACKGROUND ART

[0002] Lettuce big-vein virus (LBVV) is a virus belonging to Varicosavirus, is composed of two RNAs (7.0 kb and 6.5 kb RNA), and retains a coat protein of 48 kDa. LBVV is a soil-borne virus that is spread in the soil by Olpidum brassicae, and occurs in the United States, Australia, New Zealand, Japan and Europe. Since this virus infects lettuce and remarkably lowers its quality and yield, it is a serious problem in lettuce production.

[0003] Unfortunately, there has not yet been reported the existence of a gene that makes lettuce resistant to this virus. Although several cultivars such as Entree, Sea Green and Pacific are commercially available as LBVV-resistant cultivars, their resistance is low. Thus, there has not yet been found a radical solution to disease damage caused by LBVV.

[0004] Elucidation of the virus genetic information is an important step in preventing disease damage caused by the virus. However, isolation and purification of LBVV are extremely difficult for reasons such as the instability of the viral particles, tendency for viral particles to readily aggregate with each other, and extremely low concentration of the virus in plants. Although, so far, two successful examples of purification of the virus have been reported (S. Kuwata et al., (1983), Annals of the Phytopathological Society of Japan, 49, 246-251; and, H. J. Vetten et al. (1987), Journal of Phytopathology, 120, 53-59), the reproducibility is low and the purified amounts are extremely low. Consequently, as to LBVV, no genetic information has been elucidated at all.

DISCLOSURE OF THE INVENTION

[0005] The present invention has been achieved in consideration of the above circumstances, and objectives of the present invention are to isolate lettuce big-vein viral (LBVV) proteins and nucleic acids that encode the proteins and to elucidate the structure thereof. In addition, another objective of the present invention is to endow lettuce with resistance to LBVV through expression of the nucleic acid or its antisense nucleic acid in lettuce. Moreover, still another objective of the present invention is to provide a method of diagnosing infection with LBVV by detecting the nucleic acid or a protein encoded by the nucleic acid.

[0006] LBVV is an RNA virus, and it is likely that, if a DNA encoding a protein of the virus or its antisense DNA is expressed in a plant, the production and function of LBVV proteins can be inhibited at the transcription level or translation level (P. F. Tennant et al., (1994), Phytopathology, 84, 1359-1366; C. C. Huntley & T. C. Hall, (1993), Virology, 192, 290-297; D. C. Baulcombe, (1996), The Plant Cell, 8, 1833-1844).

[0007] The present inventors focused on this idea, and isolated the genes encoding LBVV proteins in order to produce lettuce resistant to LBVV.

[0008] Specifically, the present inventors first obtained highly purified LBVV, and then applied this to SDS-polyacrylamide gel electrophoresis to detect the coat protein that constitutes the virus. The detected coat protein was purified and then decomposed into peptides, followed by determination of the partial amino acid sequences of the peptides by the Edman's method. Moreover, an RNA encoding the coat protein of LBVV was cloned by polymerase chain reaction (PCR) using primers designed on the basis of information from the determined amino acid sequences, followed by determination of its nucleotide sequence.

[0009] Next, in order to determine the gene that encodes the full-length coat protein of LBVV, RNAs were prepared from purified virus and from leaf infected with the virus that had exhibited obvious symptoms of infection, and 3′RACE and 5′RACE were carried out using these RNA molecules. As a result, the present inventors have succeeded not only in isolating the RNA molecule that encodes LBVV coat protein, but also in determining its primary structure. Moreover, by genome walking method, the present inventors have succeeded in isolating RNA molecules encoding four other non-structural proteins of LBVV and in determining their primary structures as well.

[0010] Similarly, the present inventors also succeeded in isolating an RNA molecule that encodes a polymerase protein from highly purified LBVV.

[0011] The isolated RNA molecule or its antisense molecule is able to endow lettuce plants with resistance to LBVV by its expression, and thereby, it is possible to improve lettuce productivity. In addition, genetic diagnosis of LBVV can also be carried out by designing and using a primer specific to LBVV based on sequence information of the isolated RNA molecules. Furthermore, the antisera that bind to LBVV proteins can be produced based on the resulting sequence information, and these can be used for serological diagnosis of LBVV.

[0012] The present invention was completed on the basis of the above findings, and provides LBVV proteins, nucleic acids encoding the proteins, and their production and use.

[0013] More specifically, the present invention provides the following:

[0014] (1) a nucleic acid encoding a protein of lettuce big-vein virus, said nucleic acid selected from the group consisting of:

[0015] (a) a nucleic acid encoding a protein comprising the amino acid sequence of any one of SEQ ID NOs: 2 through 6 and SEQ ID NO: 13; and

[0016] (b) the nucleic acid of (a) comprising the coding region of the nucleotide sequence of SEQ ID NO: 1 or 12;

[0017] (2) the nucleic acid according to (1), wherein the nucleic acid is an RNA;

[0018] (3) the nucleic acid according to (1), wherein the nucleic acid is a DNA;

[0019] (4) a DNA encoding a sense RNA complementary to a complementary strand of the nucleic acid according to (2);

[0020] (5) a DNA encoding an antisense RNA complementary to the nucleic acid according to (2);

[0021] (6) a DNA encoding an RNA having ribozyme activity that specifically cleaves the nucleic acid according to (2);

[0022] (7) a vector comprising the nucleic acid according to (3);

[0023] (8) a transformed cell comprising the nucleic acid according to (3), or the vector according to (7);

[0024] (9) a protein encoded by the nucleic acid according to (1);

[0025] (10) an antibody that binds to the protein of (9);

[0026] (11) a method of producing the protein according to (9) wherein said method comprises the steps of:

[0027] (a) culturing the transformed cell of (8); and

[0028] (b) recovering an expressed protein from said transformed cell or its culture supernatant;

[0029] (12) a vector comprising the DNA according to any one of (4) through (6);

[0030] (13) a transformed lettuce cell that comprises the nucleic acid according to (1), the DNA according to any one of (4) through (6), or the vector according to (7) or (12);

[0031] (14) a transformed lettuce plant comprising the transformed lettuce cell according to (13);

[0032] (15) a transformed lettuce plant that is a progeny or a clone of the transformed lettuce plant according to (14);

[0033] (16) a propagation material of the transformed lettuce plant according to (14) or (15); and

[0034] (17) a method of diagnosing infection caused by the lettuce big-vein virus wherein said method comprises the step of:

[0035] detecting the nucleic acid of (1), or detecting the protein of (9) in lettuce cells; in Olpidum brassicae, a fungal vector of lettuce big-vein virus; or in soil comprising the fungal vector.

[0036] The present invention provides LBVV proteins and nucleic acids encoding the proteins. The nucleotide sequence of cDNA that encodes LBVV proteins isolated by the present inventors and that is included in the present invention is shown in SEQ ID NO: 1, and the amino acid sequences of the proteins encoded by the cDNA are shown in SEQ ID NOs: 2 through 6. The isolated cDNA is a 6078 nucleotides sequence and encodes five proteins. Protein 1 (coat protein: Example 1) has a translation initiation site at nucleotide 209 and encodes 397 amino acids (the isolated clone was named “LBVV-cp”/SEQ ID NO: 2); protein 2 (Example 3) has a translation initiation site at nucleotide 1492 and encodes 333 amino acids (SEQ ID NO: 3); protein 3 (Example 3) has a translation initiation site at nucleotide 2616 and encodes 290 amino acids (SEQ ID NO: 4); protein 4 (Example 3) has a translation initiation site at nucleotide 3842 and encodes 164 amino acids (SEQ ID NO: 5); and protein 5 (Example 3) has a translation initiation site at nucleotide 4529 and encodes 368 amino acids (SEQ ID NO: 6).

[0037] In addition, the nucleotide sequence of cDNA (Example 4) that encodes a polymerase of LBVV isolated by the present inventors and that is also included in the present invention is shown in SEQ ID NO: 12, and the amino acid sequence of the protein encoded by the cDNA is shown in SEQ ID NO: 13 (the isolated clone was named “LBVV-L”). The isolated cDNA is a 6793 nucleotides sequence, has a translation initiation site at nucleotide 337, and encodes 2040 amino acids.

[0038] Moreover, the present inventors have revealed that LBVV is a negative-strand RNA virus that contains more positive-strands in its viral particles than usual.

[0039] This is the first example of demonstrating the genes and protein primary structures of LBVV.

[0040] Nucleic acids encoding LBVV-cp protein (LBVV protein 1) LBVV proteins 2 to 5, or LBVV-L protein according to the present invention include a DNA and an RNA. The DNA includes a cDNA and a chemically synthesized DNA, and the RNA includes a viral genomic RNA, mRNA, and synthetic RNA. A nucleic acid of the present invention can be prepared using conventional means by a person with ordinary skill in the art. Specifically, a first strand DNA can be synthesized by carrying out a reverse transcription reaction using, as a template, (1) an. RNA prepared by de-proteinizing purified virus by a method such as the SDS-phenol method or (2) the total nucleic acids extracted from a virus-infected leaf by the CTAB method and so on and using a primer designed from the sequence of a nucleic acid of the present invention or a random primer. From the first strand DNA prepared by this method, a second strand DNA can be synthesized according to the method of Gubler & Hoffman (U. Gubler and B. J. Hoffman, (1983), Gene 25, 263-269), and the nucleic acid of the present invention can be cloned in various commercially available plasmids or phagemid vectors. Alternatively, a DNA encoding an RNA of the virus can be amplified by polymerase chain reaction using a primer designed from the sequence of a nucleic acid of the present invention and using the first strand DNA as a template, and the nucleic acid of the present invention can be cloned by TA cloning using the pGEM®-T vector and so on or by cloning in various commercially available plasmid vectors by adding a restriction enzyme site to the primer.

[0041] A nucleic acid of the present invention can also be used for the preparation of recombinant protein and for the production of lettuce resistant to LBVV.

[0042] A recombinant protein is usually prepared by inserting a DNA encoding a protein of the present invention into an appropriate expression vector, introducing the vector into an appropriate cell, culturing the transformed cells, allowing the cells to express the recombinant protein, and purifying the expressed protein. A recombinant protein can be expressed as a fusion protein with other proteins so as to be easily purified, for example, as a fusion protein with maltose binding protein in Escherichia coli (New England Biolabs, USA, vector pMAL series), as a fusion protein with glutathione-S-transferase (GST) (Amersham Pharmacia Biotech, vector pGEX series), or tagged with histidine (Novagen, pET series). The host cell is not limited so long as the cell is suitable for expressing the recombinant protein. It is possible to utilize yeasts or various animal, plant, or insect cells by change the expression vector, besides the above described E. coli. A vector can be introduced into a host cell by a variety of methods known to one skilled in the art. For example, a transformation method using calcium ions (Mandel, M. and Higa, A. (1970) Journal of Molecular Biology, 53, 158-162, Hanahan, D. (1983) Journal of Molecular Biology, 166, 557-580) can be used to introduce a vector into E. coli. A recombinant protein expressed in host cells can be purified and recovered from the host cells or the culture supernatant thereof by known methods. When a recombinant protein is expressed as a fusion protein with maltose binding protein or other partners, the recombinant protein can be easily purified by affinity chromatography.

[0043] The resulting protein can be used to prepare an antibody that binds to the protein. For example, a polyclonal antibody can be prepared by immunizing immune animals, such as rabbits, with a purified protein of the present invention or its portion, collecting blood after a certain period, and removing clots. A monoclonal antibody can be prepared by fusing myeloma cells with the antibody-forming cells of animals immunized with the above protein or its portion, isolating a monoclonal cell expressing a desired antibody (hybridoma), and recovering the antibody from the cell. The obtained antibody can be utilized to purify or detect a protein of the present invention. The antibody of the present invention includes antiserum, polyclonal antibody, monoclonal antibody, and fragment thereof.

[0044] In the case of producing LBVV-resistant lettuce, a DNA that represses the production and function of LBVV proteins should be introduced into lettuce cells, and the resulting transformed lettuce cells should be regenerated.

[0045] A DNA encoding an RNA that hybridizes with either strand (sense strand or complementary strand) of an RNA encoding LBVV proteins can be used as the DNA that represses the production and function of the LBVV proteins.

[0046] Examples of a DNA encoding an RNA that hybridizes with viral genomic sense strand and with mRNAs include a DNA that encodes an antisense RNA that is complementary to the transcription product of a DNA encoding the protein described in any one of SEQ ID NOs: 2 through 6 and SEQ ID NO: 13 isolated by the present inventors (preferably, a DNA comprising a coding region of the nucleotide sequence described in SEQ ID NO: 1 or SEQ ID NO: 12). Herein, the term “complementary” also means not completely complementary so long as the production of LBVV proteins can be effectively inhibited. The transcribed RNA has preferably 90% or more complementarity and most preferably 95% or more complementarity to the RNA encoding the target LBVV protein. Herein, the term “complementarity” refers to the percentage of the number of nucleotides that form complementary base pairs, to the total number of base pairs in a region where the two sequences correspond to each other, in the case that the sequences are aligned so that the number of complementary base pairs may be maximized.

[0047] The DNA that encodes a sense RNA complementary to a complementary strand of RNA encoding the protein described in any one of SEQ ID NOs: 2 through 6 and SEQ ID NO: 13 isolated by the present inventors (preferably, an RNA comprising a coding region of the nucleotide sequence described in SEQ ID NO: 1 or SEQ ID NO: 12) can be used as a DNA encoding an RNA that hybridizes with a complementary strand of viral genomic RNA. Herein, the term “complementary” also means not completely complementary so long as the production of LBVV proteins can be effectively inhibited. The transcribed sense RNA has preferably 90% or more complementarity and most preferably 95% or more complementarity to the RNA (complementary strand) encoding the target LBVV protein.

[0048] In order to effectively inhibit the expression of the target gene, the above descried antisense and sense DNAs should be at least 15 nucleotides long, more preferably at least 100 nucleotides long, and still more preferably at least 500 nucleotides long. These DNAs are generally shorter than 5 kb, and preferably shorter than 2.5 kb.

[0049] In addition, it is likely that a DNA encoding a ribozyme that cleaves at least one of the strands of an RNA that encodes LBVV proteins can be used as a DNA that represses the production of the LBVV proteins.

[0050] A ribozyme is an RNA molecule that has catalytic activities. There are many ribozymes having various activities. Research on the ribozymes as RNA cleaving enzymes has enabled the design of a ribozyme that site-specifically cleaves RNA. While some ribozymes of the group I intron type or the M1RNA contained in RNaseP consist of 400 nucleotides or more, others belonging to the hammerhead type or the hairpin type have an activity domain of about 40 nucleotides (Makoto Koizumi and Eiko Ohtsuka (1990) Tanpakushitsu Kakusan Kohso (Nucleic acid, Protein, and Enzyme) 35: 2191-2200).

[0051] The self-cleavage domain of a hammerhead type ribozyme cleaves at the 3′ side of C15 of the sequence G13U14C15. Formation of a nucleotide pair between U14 and A at the ninth position is considered important for the ribozyme activity. Furthermore, it has been shown that the cleavage also occurs when the nucleotide at the 15th position is A or U instead of C (M. Koizumi et al. (1988) FEBS Letters, 228: 228-230). If the substrate binding site of the ribozyme is designed to be complementary to the RNA sequences adjacent to the target site, one can create a restriction-enzyme-like RNA cleaving ribozyme which recognizes the sequence UC, UU, or UA within the target RNA (M. Koizumi et al. (1988) FEBS Letters, 239: 285; Makoto Koizumi and Eiko Ohtsuka (1990) Tanpakushitsu Kakusan Kohso (Protein, Nucleic acid, and Enzyme), 35: 2191-2200; M. Koizumi et al. (1989) Nucleic Acids Research, 17: 7059-7071). For example, in LBVV-cp gene, LBVV protein 2 to 5 genes, or LBVV-L gene (SEQ ID NO: 1 or 12), there are a plurality of sites that can be used as the ribozyme target.

[0052] The hairpin type ribozyme is also useful in the present invention. A hairpin type ribozyme can be found, for example, in the minus strand of the satellite RNA of Tobacco ringspot virus (J. M. Buzayan, Nature 323: 349-353 (1986)). This ribozyme has also been shown to target-specifically cleave RNA (Y. Kikuchi and N. Sasaki (1992) Nucleic Acids Research, 19: 6751-6775; Yo Kikuchi (1992) Kagaku To Seibutsu (Chemistry and Biology) 30: 112-118).

[0053] The ribozyme designed to cleave the target is fused with a promoter, such as the cauliflower mosaic virus 35S promoter, and with a transcription termination sequence, so that it will be transcribed in plant cells. However, if extra sequences have been added to the 5′ end or the 3′ end of the transcribed RNA, the ribozyme activity can be lost. In this case, one can place an additional trimming ribozyme, which functions in cis to perform the trimming on the 5′ or the 3′ side of the ribozyme portion, in order to precisely cut the ribozyme portion from the transcribed RNA containing the ribozyme (K. Taira et al. (1990) Protein Eng. 3: 733-738; A. M. Dzaianott and J. J. Bujarski (1989) Proc. Natl. Acad. Sci. USA 86: 4823-4827; C. A. Grosshands and R. T. Cech (1991) Nucleic Acids Research, 19: 3875-3880; K. Taira et al. (1991) Nucleic Acid Research, 19: 5125-5130). Multiple sites within the target gene can be cleaved by arranging these structural units in tandem to achieve greater effects (N. Yuyama et al., Biochem. Biophys. Res. Commun. 186: 1271-1279 (1992)). By using such ribozymes, it is possible to specifically cleave the transcription products of the target gene in the present invention, thereby repressing the expression of the gene.

[0054] Vectors used for the transformation of lettuce cells are not limited so long as the vector can express an inserted DNA in the cells. For example, vectors comprising promoters for constitutive gene expression in lettuce cells (e.g., cauliflower mosaic virus 35S promoter); and promoters inducible by exogenous stimuli can be used. Examples of suitable vectors include pBI binary vector. The “lettuce cell” into which the vector is to be introduced includes various forms of lettuce cells, such as cultured cell suspensions, protoplasts, leaf sections, and callus.

[0055] A vector can be introduced into lettuce cells by known methods, such as the polyethylene glycol method, polycation method, electroporation, Agrobacterium mediated transfer, and particle bombardment. For example, the method described in the literature (S. Z. Pang et al., (1996), The Plant Journal, 9, 899-909) is a preferable one.

[0056] Regeneration of a lettuce plant from transformed lettuce cells can be carried out by methods known to a person with ordinary skill in the art according to the type of lettuce cells. Examples of preferable regeneration methods are described in the literature (S. Enomoto, et al., (1990), Plant Cell Reports, 9, 6-9).

[0057] Once a transformed lettuce plant in which the DNA of the present invention is introduced into the genome is obtained, it is possible to gain progenies from that plant by sexual propagation. Alternatively, plants can be mass-produced from propagation materials (for example, seeds, tubs, callus, protoplast, and so on) obtained from the plant, or progenies or clones thereof. The present invention includes plant cells transformed with the DNA of the present invention; plants including these cells; progenies and clones of the plants; and propagation materials of the plants and their progenies and clones.

[0058] In addition, the present invention provides a method of diagnosing infection with LBVV. One embodiment of the diagnostic method of the present invention comprises detecting, using a primer or probe, a LBVV RNA or an RNA encoding the viral protein. Nucleic acid comprising at least 15 nucleotides homologous or complementary to a DNA encoding the LBVV protein described in any one of SEQ ID NOs: 2 through 6 and 13 can be used for the probe or primer. The nucleic acid is preferably nucleic acid that specifically hybridizes with a DNA encoding the LBVV protein described in any one of SEQ ID NOs: 2 through 6 and 13.

[0059] The primer or probe may be labeled as necessary. Examples of labels include a radioactive label.

[0060] In this diagnosis, for example, a test sample is prepared from lettuce suspected of being infected with lettuce big-vein virus, Olpidum harboring the virus, or soil containing the virus, and PCR using the above primer or northern blotting using the above probe is carried out on the sample.

[0061] Another mode of the diagnostic method of the present invention is a method characterized by detecting LBVV proteins using antibody. Antibody used in this diagnosis can be prepared, for example, by synthesizing peptide using the antigenic region estimated from the resulting amino acid sequences (any of SEQ ID NOs: 2 through 6 and 13), by binding the peptide to a carrier protein such as KLH or BSA, and by immunizing rabbits with this. In addition, the antibody can also be produced by tagging LBVV proteins with histidine using the QIAexpress Type IV Kit (QIAGEN), by expressing the tagged protein in E. coli, and by immunizing rabbits with the resulting protein. The antibody may be labeled as necessary. Examples of labels include an enzyme label. In addition, instead of directly labeling the antibody itself, the antibody may be labeled via a substance such as protein A that binds to the antibody, followed by detection of the target protein.

[0062] In this diagnosis, a test sample is prepared from, for example, lettuce suspected of being infected with lettuce big-vein virus, Olpidum harboring the virus, or soil containing the virus, and then, ELISA or western blotting is carried out on the sample using the above antibody.

BEST MODE FOR CARRYING OUT THE INVENTION

[0063] The present invention is specifically illustrated below with reference to the examples, but is not construed as being limited thereto.

EXAMPLE 1 Cloning of Coat Protein Gene of Lettuce Big-Vein Virus (LBVV)

[0064] Contaminated soil was sampled from a lettuce (cultivar: Cisco) field in Kagawa Prefecture, Japan that exhibited characteristic big-vein symptoms in 1997. The virus was maintained in resting spores in dry soil kept in the laboratory. Cisco, a cultivar of lettuce, was used for virus purification, and the virus was inoculated by regular transfer in soil.

[0065] Virus purification was carried out by modifying the method of Kuwata et al. (S. Kuwata, et al., (1983), Annals of the Phytopathological Society of Japan, 49, 246-251). The First step of sedimenting virions by low-speed centrifugation was omitted. The virus fraction was obtained by treating with 1% Triton-X and 1% Briji-35, followed by C₂SO₄ density gradient centrifugation. When the purified virus obtained by this purification method was subjected to SDS-polyacrylamide electrophoresis, only a single 48 kDa band was detected. In addition, since only clusters of LBVV particles were observed by electron microscopy while other impurities were not observed, the resulting virus was presumed to have considerably high purity.

[0066] After treatment of the purified virus with Proteinase K-SDS, extraction of viral nucleic acid was carried out by phenol/chloroform and ethanol precipitation. The purified viral nucleic acid was used for synthesis of first strand cDNA after denaturing with dimethylsulfoxide. Poly(A)+RNA was isolated from the virus-infected lettuce leaf that exhibited obvious big-vein symptoms by using the Dynabeads® mRNA DIRECT™ Kit (Dynal®). Synthesis of first strand cDNA was performed by carrying out a reverse transcription reaction with SUPERSCRIPT™ II Rnase H⁻ Reverse Transcriptase (Gibco BRL) using a random primer or an Oligo-dT-Bam HI primer.

[0067] Determination of the internal amino acid sequences of LBVV coat protein was carried out in the manner described below. After purified LBVV was subjected to 12.5% SDS-polyacrylamide electrophoresis, the polypeptides were transferred to a nitrocellulose membrane and the band of interest was cut out followed by carboxymethylation, and treatment with lysyl endopeptidase. After the treatment, 38 peptide fragments of the LBVV coat protein were obtained by reverse phase HPLC, and the amino acid sequences of several internal peptide fragments were determined.

[0068] 5LB111 primer (GARWSITGGGAYGAYGARWSIAC/SEQ ID NO: 7) and 3LB171 primer (GCRTCDATRTARTCIACICCIGG/SEQ ID NO: 8) were designed based on ESWDDESTIAMP and NLEVPGVDYIDA of the resulting amino acid sequences. PCR was carried out using these primers and Takara Taq (Takara), a 274 bp PCR product was obtained. The resulting PCR product was cloned using pGEM®-T Easy Vector Systems (Promega) and its nucleotide sequence was determined.

[0069] In order to determine the full-length coat protein gene of LBVV, 3′RACE or 5′RACE were aimed using an RNA from the purified virus or a Poly(A)+RNA from the LBVV-infected leaf. In the case of 3′RACE, 891-bp PCR product was obtained using a Poly(A)+RNA from the LBVV-infected leaf, and using Olido-dT-Bam HI primer and 5LB171 primer (AAYYTIGARGTICCIGGIGTIGA/SEQ ID NO: 9). In the case of 5′RACE, a 760-bp PCR product was obtained with the 5′RACE System for Rapid Amplification of cDNA Ends, Version 2.0 (Gibco BRL) using an RNA from purified virus or a Poly(A)+RNA from the LBVV-infected leaf, and using 3LB5R4 primer (GTTTTTGACCCTGATAG/SEQ ID NO: 10) and 3LB5R5 primer (GTCGACTCTAGACACTTGTTGTTTGTCGTG/SEQ ID NO: 11). The resulting PCR products were cloned using pGEM®-T Easy Vector Systems (Promega), and the nucleotide sequences were determined for at least six clones or more. In addition, the 500- to 700-bp PCR products from the region in the vicinity of the coat protein gene were recloned using mutually overlapping virus-specific primers. At least three clones were sequenced from each region, and the nucleotide sequence of coat protein gene was confirmed.

[0070] A 1425 nucleotides sequence was determined using the above method. This gene had a translation initiation site at nucleotide 209, and encoded 397 amino acids (see SEQ ID NO: 1).

EXAMPLE 2 Production of Transformed Lettuce

[0071] (1) Sterilization and Culturing of Lettuce Seeds Lettuce seeds were immersed for several seconds in 70% ethanol followed by treating for 15 minutes in a sterilization solution (10% sodium hypochlorite, 0.05% Tween-20). Next, the seeds were rinsed with sterilized water, seeded on Hyponex agar medium (prepared by dissolving 3.0 g of Hyponex powder, 10.0 g of sucrose and 8.0 g of agar in one liter of distilled water and then adjusting the pH to 5.8 with 1 N NaOH) in a plant box, and grown for about 2 weeks under the light condition at 25 to 28° C. until the true leaf reached about 5 cm. (2) Culturing and Inoculation of Agrobacterium Agrobacterium was inoculated into YEB liquid medium (prepared by dissolving 1.0 g of yeast extract, 5.0 g of beef extract, 5.0 g of peptone, 5.0 g of sucrose and 0.5 g of MgSO₄ 7H₂O in one liter of distilled water and then adjusting the pH to 7.0 with 1N NaOH) comprising 250 μg/ml streptomycin, 5 μg/ml rifampicin and 50 μg/ml kanamycin, and then cultured with shaking overnight at 28° C. The Agrobacterium culture liquid was then sub-cultured to fresh YEB medium (comprising the above-mentioned antibiotics) and additionally cultured with shaking for one day at 28° C.

[0072] The young lettuce plants in which the true leaf had grown to about 5 cm were transferred to plastic Petri dishes, the true leaf was cut into pieces measuring about 5 mm, and the pieces of the leafs were immersed for 1 minute in Agrobacterium culture liquid diluted ten-fold. Next, the pieces were arranged on Murashige & Skoog medium (MS medium) (pH 5.8) comprising 3% sucrose, 0.5 ppm benzyladenine phosphate (BAP), 0.1 ppm naphthalene acetic acid (NAA) and 0.8% agar at 15 to 20 pieces/plate and co-cultured for 2 days at 25° C. under 2000 lux condition. After the co-culturing, the pieces were cultured under sterile conditions for 7 days in MS medium (pH 5.8) comprising 3% sucrose, 0.5 ppm BAP, 0.1 ppm NAA, 250 μg/ml carbenicillin and 0.8% agar.

[0073] (3) Selection and Culturing of Transformants

[0074] After sterile culture, the pieces were transferred to MS medium (pH 5.8) comprising 3% sucrose, 0.5 ppm BAP, 0.1 ppm NAA, 250 μg/ml carbenicillin, 50 μg/ml kanamycin and 0.8% agar and cultured at 25° C. under 2000 lux condition. The pieces were sub-cultured about every 2 weeks, and regeneration was observed after about 2 to 3 months from those plants that were inoculated with Agrobacterium.

[0075] The re-differentiated individuals were transferred to MS medium (pH 5.8) comprising 3% sucrose, 0.3 ppm BAP, 500 μg/ml carbenicillin and 0.8% agar, and were sub-cultured about every 2 weeks. When the re-differentiated individuals reached a size of about 3 cm, the cutting of them were inserted and planted into ½-fold MS agar medium comprising 500 μg/ml of carbenicillin and allowed to take root.

[0076] (4) Lettuce Acclimation and Seed Sampling

[0077] In the state in which the re-differentiated individuals took root and the shoots had grown to 1 to 2 cm, the shoots were cut, and the cuttings were planted and allowed to take root in vermiculite immersed in a 500-fold diluted aqueous solution of Hyponex. The plants were acclimated by gradually opening the cover of the plant box to provide ventilation. After the plants had been sufficiently acclimated, they were permanently planted in Polypot comprising Kureha Horticultural Soil (Kureha engei baido) in a closed greenhouse (maximum air temperature: 30° C., natural photoperiod). Then, they were allowed to be bolting and flowering, and seeds were sampled. [Example 3] Cloning of LBVV RNA2 Gene Contaminated soil was sampled from a lettuce (cultivar: Cisco) field in Kagawa Prefecture, Japan that exhibited characteristic big-vein symptoms in 1997. The virus was maintained in resting spores in dry soil kept in the laboratory. Cisco, a cultivar of lettuce, was used for virus purification, and the virus was inoculated by regular transfer in soil.

[0078] Virus purification and RNA purification were carried out in accordance with Example 1. Synthesis of cDNA and determination of nucleotide sequence were carried out in accordance with the method of C. F. Fazeli & M. A. Rezaian (Journal of General Virology, 81, 605-615) using a genome walking method, in which the sequence is extended by synthesizing primer to the downstream direction. First, virus-specific 5LB5R3 primer (AGCTCTGAACAACGACATG/SEQ ID NO: 16) was produced based on Example 1, and a first CDNA was synthesized with SUPERSCRIPT™ II RNase H⁻ Reverse Transcriptase using an RNA from the purified LBVV as a template. Next, a second cDNA was synthesized with Klenow Fragment (Takara) using universal primer dN6 (5′-GCCGGAGCTCTGCAGAATTCNNNNNN-3′/SEQ ID NO: 14). After removing excess primer with the GlassMax DNA Isolation Spin Cartridge System (Gibco BRL), PCR was carried out using the virus-specific primer and universal primer (5′-GCCGGAGCTCTGCAGAATTC-3′/SEQ ID NO: 15) and the resulting PCR product was cloned using pGEM®-T Easy Vector Systems. Then, the nucleotide sequence was determined. The same procedure was then repeated four times to determine up to 5177 nucleotides. Determination of the 3′-terminus of RNA2 was carried out by 5′RACE (Note: since purified LBVV RNA contains both a positive-strand and a negative-strand, not only the 5′-terminus but also 3′-terminus can be determined by 5′RACE), and a 6078 nucleotides sequence was determined that comprised genes for five proteins encoded by LBVV (SEQ ID NO: 1). Furthermore, the 500- to 700-bp PCR products from RNA2 were recloned using mutually overlapping virus specific primers. At least three clones were sequenced from each region, and the nucleotide sequence of RNA2 was confirmed.

[0079] A 6078 nucleotides sequence was determined using the above method. This gene encoded five proteins. Protein 1 (coat protein: Example 1) had a translation initiation site at nucleotide 209 and encoded 397 amino acids (SEQ ID NO: 2), protein 2 had a translation initiation site at nucleotide 1492 and encoded 333 amino acids (SEQ ID NO: 3), protein 3 had a translation initiation site at nucleotide 2616 and encoded 290 amino acids (SEQ ID NO: 4), protein 4 had a translation initiation site at nucleotide 3842 and encoded 164 amino acids (SEQ ID NO: 5), and protein 5 had a translation initiation site at nucleotide 4529 and encoded 368 amino acids (SEQ ID NO: 6). When the homology of the amino acid sequences was compared with other viruses, only protein 1 (coat protein) was observed to be homologous to the nucleocapsid protein (coat protein) of viruses belonging to the family Rhabdoviridae. [Example 4] Cloning of LBVV Polymerase Gene Contaminated soil was sampled from a lettuce (cultivar: Cisco) field in Kagawa Prefecture, Japan that exhibited characteristic big-vein symptoms in 1997. The virus was maintained in resting spores in dry soil kept in the laboratory. Cisco, a cultivar of lettuce, was used for virus purification, and the virus was inoculated by regular transfer in soil.

[0080] Virus purification was carried out in the same manner as the procedure for virus purification of Example 1. Extraction of highly pure LBVV RNA was carried out in the manner described below. After treatment of the purified virus with Proteinase K-SDS, it was extracted with phenol/chloroform and precipitated with ethanol. Next, after the viral nucleic acid was treated with DNase and further purified with The RNaid® Kit (BIO 101), a 7.3 kb RNA of two LBVV RNAs was isolated by 1% agarose gel (SeaPlaque GTG agarose, FMC) electrophoresis and used for synthesis of cDNA. Synthesis of cDNA was carried out in accordance with the method of P. Froussard (Nucleic Acids Research, 20, 2900). In brief, a first cDNA was synthesized with the SUPERSCRIPT™ II RNase H⁻ Reverse Transcriptase using universal primer-dN6 (5′-GCCGGAGCTCTGCAGAATTCNNNNNN-3′/SEQ ID NO: 14). Next, a second cDNA was synthesized with Klenow Fragment, PCR was carried out using universal primer (5′-GCCGGAGCTCTGCAGAATTC-3′/SEQ ID NO: 15), and the resulting PCR product was cloned using pGEM®-T Easy Vector Systems Then, the nucleotide sequence was determined.

[0081] Eight partial LBVV polymerase gene fragments of about 500 bp were obtained. Both terminals of the polymerase gene were filled by 5′RACE and the gaps between the fragments were filled in by RT-PCR, thereby determining a 6793 nucleotides sequence that contained the full-length polymerase gene (SEQ ID NO: 12). Furthermore, the 500- to 700-bp PCR products from polymerase gene were recloned using mutually overlapping virus-specific primers. At least three clones were sequenced from each region, and the nucleotide sequence of polymerase gene was confirmed.

[0082] This gene encoded 2040 amino acids with a translation initiation site at nucleotide 337 (SEQ ID NO: 13). When the homology of the amino acid sequence was compared with other viruses, it was confirmed that the protein is homologous to the polymerases of viruses belonging to the family Mononegavirales, especially, viruses belonging to the family Rhabdoviridae, and retained four motifs considered to be responsible for polymerase activity.

INDUSTRIAL APPLICABILITY

[0083] According to the present invention, nucleic acids encoding proteins of LBVV were isolated, and their primary structure was elucidated. It therefore became possible to produce a lettuce plant having resistance to the virus by expressing the nucleic acid or its antisense nucleic acid in lettuce. In addition, it became possible to make a diagnosis of infection with LBVV by detecting the nucleic acid or protein encoded thereby.

1 16 1 6078 DNA Lettuce Big-vein Virus 1 2 397 PRT Lettuce Big-vein Virus 2 Met Ala His Pro Lys Leu Lys Met Leu Asp Ala Phe Ser Asp Val Val 1 5 10 15 Glu Ile Thr Gly Lys Thr Ala Gly Lys Glu Ser Trp Asp Asp Glu Ser 20 25 30 Thr Ile Ala Met Pro Ser Tyr Lys Leu Ser Val Leu Ser Asp Ala Asp 35 40 45 Ala Val Arg Glu Val Lys Ile Phe Leu Thr Gly Leu Phe Val Arg Ser 50 55 60 Ser Pro Arg Ala Ile Ala Ala Ala Leu Ile Met Thr Trp Asn Met Arg 65 70 75 80 Ser Val Asp Pro Val Ala Val Arg Ile Phe Pro Ala Lys Asp Lys Gly 85 90 95 Lys Asp Thr Ala Asp Val Asp Val Lys Asn Leu Glu Val Pro Gly Val 100 105 110 Asp Tyr Ile Asp Ala Met Val Glu Thr Asn Val Lys Asp Ala Ser Asp 115 120 125 Ile Glu Ile Ile Arg Ala Gly Ala Phe Ile Ala Ala Ser Thr Leu Lys 130 135 140 Met Phe Ala Lys Ser Phe Thr Gly Trp Thr Gln Ala Trp Glu His Lys 145 150 155 160 His Ile Gln Lys Arg Tyr Ala Asp Phe Cys Lys Thr Glu Tyr Pro Phe 165 170 175 Lys Glu Phe Thr Thr Asn Asn Lys Cys Ala Glu Thr Met Tyr Glu Ala 180 185 190 Tyr Gln Gly Gln Lys Leu Tyr Gln Gly Thr Leu Gly Arg Ile Leu Tyr 195 200 205 Ala Leu Gly Asp Val Ala Asp Pro Arg Gln Thr Glu Met Leu Phe Asp 210 215 220 Gln His Leu Ala Asn Thr Gly Met His Ile Ile Pro Gln Phe Thr Asn 225 230 235 240 Ala Gln Leu Ser Ile Gly Ala Thr Thr Ala Gly Leu Leu Ser Ala Leu 245 250 255 Asn Tyr Gly Gln Asn Phe Gly Thr Leu Met Gln Leu Lys Lys Leu Ile 260 265 270 Asn Glu Ser Leu Ser Lys Pro Pro Gly Pro Asp Asn Arg Ala Thr Trp 275 280 285 Arg Phe Ala Arg Ile Phe Asp Pro Ser Val Phe Gln Thr Leu Gln Thr 290 295 300 Lys Tyr Cys Ala Asp Thr Val Ala Ile Leu Ala Asn Ile Asn Ser Met 305 310 315 320 Gly Lys Leu Ser Thr Glu Thr Ser Asn Pro Leu Asn Ile Ala Val Leu 325 330 335 Lys Gln Met Ala Pro Glu Arg Lys Arg Tyr Thr Arg Gln Val Ala Lys 340 345 350 Asn Ile Tyr His His Phe Met Val Val Ala Arg Ala Leu Asn Asn Asp 355 360 365 Met Phe Asp Thr Asp Lys Tyr Lys Phe Val Glu Ser Asp Asp Glu Glu 370 375 380 Glu His Val Ala Asn Glu Gly Glu Thr Pro Val Lys Glu 385 390 395 3 333 PRT Lettuce Big-vein Virus 3 Met Thr Gly Arg Phe Val Arg Asp Gln Ser Ala Met Thr Lys Ala Ile 1 5 10 15 Ala Ser Ser Gly Lys Ala Gly Gln Glu Thr Thr Lys Gln Thr Thr Ser 20 25 30 Ala Glu Lys Leu Glu Ser Glu Asn Ala Leu Leu Ser Thr Val Lys Glu 35 40 45 Met Asn Gln Gly Trp Met Ser Arg Leu Gly Ala Gly Asn Asp Tyr Asp 50 55 60 Glu Thr Glu Ala Asp Pro Ala Asp Thr Tyr Gly Asp Thr Glu Ala Asp 65 70 75 80 Leu Pro Pro Thr Ile Lys Pro Glu His Ile Lys Lys Glu Thr Arg Lys 85 90 95 Gln Asp Lys Ala Leu Gly Ile Lys Asn Val Ala Gly Thr Ser Glu Ser 100 105 110 Glu Arg Lys Ala Leu Lys Gln Trp Asp Glu Asp Glu Asn Lys Ser Asp 115 120 125 Thr Glu Lys Leu Ala Phe Leu Ala Gly Phe Arg Tyr Arg Gln Asp His 130 135 140 Asn Ser Val Val Leu Arg Ala Gln Thr Glu Gln Leu Lys Ser Leu Val 145 150 155 160 Asp Ile Leu Thr Ser Ser Ala Thr Ser Val Ser Arg Ala Ala Ser Asp 165 170 175 Ile Val Asn Ala Thr Thr Met Ser Thr Ser Lys Leu Ala Ala Ala Ile 180 185 190 Thr Lys His Ile Glu Val Pro Pro His Glu Thr Leu Thr Lys Ile Glu 195 200 205 Met Pro Lys Leu Pro Leu Ile Ser Ser Glu Ala Gly Ser Ile Ser Gly 210 215 220 Val Lys Ser Val Asp Gly Lys Ser Val Asp Glu Glu Ile Ile Asp Ser 225 230 235 240 Asn Lys Lys Glu Ser Thr Arg Ile Lys Glu Glu Ala Lys Thr Pro Lys 245 250 255 Pro Gln Ile Val Thr Pro Pro Val Ile Asp Ser Gly Pro Ile Ile Thr 260 265 270 Val Gly Gln Met Ala Ser Val Leu Gly Gly Glu Val Lys Asp Ile Leu 275 280 285 Glu Phe Tyr Glu Ile Gly Met Glu Lys Phe Glu Ser Val Ala Lys Asp 290 295 300 Leu Gly Leu Ser Tyr Glu Gly Leu Leu Arg Lys Tyr Gly Gly Leu Ser 305 310 315 320 Gly Leu Lys Gly Thr Leu Lys Lys Lys Ile Asn Leu Leu 325 330 4 290 PRT Lettuce Big-vein Virus 4 Met Ser Leu Lys Ser Ala Pro Tyr Leu Ser Glu Ile Ser Val Ser Asn 1 5 10 15 Gly Asp Ser Gly Ile Gly Phe Asp Gly Gly Cys Ala Asp Pro Tyr Ala 20 25 30 Pro Ser Arg Val Pro Ser Arg Arg Trp Asp Tyr Ser Thr Lys Trp Asp 35 40 45 Met Lys Ile Thr Gly Ala Ala Arg Glu Phe Asn Leu Ser Lys Gln Pro 50 55 60 Val Leu Thr Gly Leu Ile Asn Ser Met Arg Met Lys Thr Ser Leu Thr 65 70 75 80 His Pro Glu Ile His Val Val Trp Arg Gly Leu Val Pro Pro Ala Val 85 90 95 Cys Arg Asp Asp Val Val Val Thr Leu Arg Phe Thr Pro Asp Arg Ser 100 105 110 Glu Lys Met Gly Leu Ile Ala Gln His Thr His Gly Met His Leu Tyr 115 120 125 Met His His Val Phe Tyr Pro Ser His Ser Ile Arg Val Gly Pro Gly 130 135 140 Glu Pro Leu Pro Trp Ala Val Gly Phe Ser Val Pro Asp Phe Ser Leu 145 150 155 160 Asp Pro Asn Tyr Thr Ile Ala Glu Val His Val Arg Leu Thr Gly Tyr 165 170 175 Phe Ser Glu Leu Pro Glu Tyr Asp Ile Gln Arg Asp Ser Glu Leu Ile 180 185 190 Ser Ile Val Pro Met Glu Glu His Val Thr Gly Tyr Ala Thr Ser Ala 195 200 205 Pro Arg Ile Pro Asn Thr Ala Trp Val Ala Arg Gly Tyr Lys Ile Gly 210 215 220 Val Asn Gly Asn Ser Leu Ala Lys Lys Ile Lys Phe Leu Gln Glu Ile 225 230 235 240 Gly Val Asp Ile Glu Ala Leu Arg Met Val Gly Gln Leu Asp Asn Thr 245 250 255 Leu Lys Lys Val Ser Pro Arg Ala Ile Asp Gly Ser Pro Ser Ala Glu 260 265 270 Ala Lys Ser Glu Ala Ala Arg Leu Val Asn Ala His Val Lys Thr Leu 275 280 285 Thr Ala 290 5 164 PRT Lettuce Big-vein Virus 5 Met Asp Glu Glu Asn Val Asp Ile Thr Glu Asp Glu Leu Ser Val Ile 1 5 10 15 Ser Asp Leu Glu Leu Asp Ser Ile Thr Arg Val Val Gly Thr Asn Glu 20 25 30 Ile Lys Thr Tyr Glu Asp Tyr Lys Leu Glu Glu Ala Asn Tyr Leu Lys 35 40 45 Val Leu Asp Ile Ile Lys Lys Phe Ser Thr Ser Asp Thr Cys Glu Cys 50 55 60 Tyr Arg Cys Glu Leu Phe Glu Arg Gly Asp Ile Gly Lys Phe Leu Thr 65 70 75 80 Arg Ser Glu Phe Ser Lys Leu Ala Val Leu Tyr Trp Glu Arg Cys Gly 85 90 95 Arg Pro Arg Asn Ser Glu Ala Leu Glu Ala Phe Ile Gly Arg His Ile 100 105 110 Cys Ile Arg Cys Ala Ala Ser Ile Leu Leu Ser His His Pro Val Ile 115 120 125 Ala Met Arg Ala Asp Met Arg Leu Arg Glu Ile Tyr Ile Glu Asn Gly 130 135 140 Asp Lys Pro Ala Ser Ser Ser Gly Thr Leu Phe Ser Ala Lys Gly Lys 145 150 155 160 Gly Pro Arg Ile 6 368 PRT Lettuce Big-vein Virus 6 Met Ala Glu Arg Cys Phe Glu Ala Ala Met Thr Tyr Met Ile Pro Asn 1 5 10 15 Lys Gln Ser Val Glu Val Phe Glu Gly Leu Leu Gly Ile Leu Asp Pro 20 25 30 Val Leu Thr Ser Lys His Val Arg Arg Val Tyr Gln Glu Ile Thr Val 35 40 45 Ser Phe Leu Met Ile Ser Leu Ile Ser Asp Gln Val Asp Ser Lys Gly 50 55 60 Ile Val Arg Met Ser Asp Ser Gln Gly Asp Asp Asp Asp Ser Leu Ser 65 70 75 80 Ser Leu Thr Trp Asn Ser Lys Asn Lys Leu Trp Gly Phe Leu Val Asn 85 90 95 Pro Val Pro Ile Thr Ser Ser Asp Leu Glu Lys Arg Leu Arg Ile Ser 100 105 110 Cys Met Ile Ser Ser Asn Ala Tyr Arg Ile Gly Thr Asn Val Ala Gln 115 120 125 Val Arg Phe Leu Leu Arg Ile Gly Thr Phe Pro Leu Val Leu Ser Arg 130 135 140 Glu Leu Gly Phe Leu Cys Pro Ser Ser Ser Arg Phe Pro Ser Val Ile 145 150 155 160 Phe Val Ser Pro Asp Lys Gln Thr Glu Met Leu Arg Ile Ile Ser Ser 165 170 175 Tyr Tyr Ser Val Gly Asp Thr Glu Glu Lys Asn Cys Trp Gly Ile Leu 180 185 190 Gly Glu Arg Tyr Leu Thr Thr Ile Ser Glu Asp Ile Ser Asn Leu Val 195 200 205 Val Met Ala Phe Pro Phe Leu Gln Gly Ala Phe His Cys Ser Ser Val 210 215 220 Tyr Tyr Leu Asn Phe Gly Cys Lys Met Ala Ala Glu Gly Phe His Ala 225 230 235 240 Ile Ala Arg Glu Glu Leu Arg Ile Ala Leu Ser Asn Pro Val Leu Trp 245 250 255 Ser Asp Cys Pro Leu Lys Arg Val Tyr Asp Ser Leu Leu Gln Arg Ile 260 265 270 Pro Thr Gly Val His Ile Ser His Ser Glu Glu Lys Gly Asp Pro Thr 275 280 285 Phe Leu Pro Leu Ala Glu Tyr Cys Ser Ser His Arg Glu Cys Trp Ile 290 295 300 Cys Gly Asp Leu Lys Leu Gly Val Asp Arg Gly Ile Gly Ala Asp Phe 305 310 315 320 Arg His Leu Ser Glu Arg Arg Thr Ser Ser Pro Asp Gly Leu Asp Ala 325 330 335 Val Met Ser Ala Val Ser Arg Met Ile Tyr His His Trp Ser Ile Pro 340 345 350 Ser Trp Val Ser Gly Ala Phe Lys Ile Ala Lys Phe Ile Gly Ala His 355 360 365 7 23 DNA Artificial Sequence Description of Artificial Sequencean artificially synthesized primer sequence 7 garwsntggg aygaygarws nac 23 8 23 DNA Artificial Sequence Description of Artificial Sequencean artificially synthesized primer sequence 8 gcrtcdatrt artcnacncc ngg 23 9 23 DNA Artificial Sequence Description of Artificial Sequencean artificially synthesized primer sequence 9 aayytngarg tnccnggngt nga 23 10 17 DNA Artificial Sequence Description of Artificial Sequencean artificially synthesized primer sequence 10 gtttttgacc ctgatag 17 11 30 DNA Artificial Sequence Description of Artificial Sequencean artificially synthesized primer sequence 11 gtcgactcta gacacttgtt gtttgtcgtg 30 12 6793 DNA Lettuce Big-vein Virus CDS (337)..(6459) 12 cgagacgcat attcatacta aaattccaac aaatcaaaac cttttaacgc ccgataaaca 60 gcctttcgtc gaggcattca gcgaccctat cgtttctgtt ttgatgaatg ttgtgtattt 120 tatgttttcc gtgtttccat catccgattt tttccagatt tccctatctc caggttcttg 180 agacccttat ttctcttctt tcttctatta ctccctatcc ccgtaaccct taggattctg 240 aaccgttcag actctgagag taggatatac gtaaaaaaac gagaacaaaa ttcgctttta 300 aacattataa tatttagtaa gaactaagac aacgaa atg tct cta gca agc aga 354 Met Ser Leu Ala Ser Arg 1 5 atg aca agt gtt gga ggg gct gac aat tac gga gaa tcg gat tac gga 402 Met Thr Ser Val Gly Gly Ala Asp Asn Tyr Gly Glu Ser Asp Tyr Gly 10 15 20 tgg gat gag act gtt tta ggg gat atg cat ctt aac agc gcg atc aac 450 Trp Asp Glu Thr Val Leu Gly Asp Met His Leu Asn Ser Ala Ile Asn 25 30 35 ttg gat cta ttc aag gag ttc cta cac ata gat ccc ccc gtt tac aag 498 Leu Asp Leu Phe Lys Glu Phe Leu His Ile Asp Pro Pro Val Tyr Lys 40 45 50 gtc aag gaa aat cac agg tta aca gaa gag cta aga gaa ctt caa tcc 546 Val Lys Glu Asn His Arg Leu Thr Glu Glu Leu Arg Glu Leu Gln Ser 55 60 65 70 ctg gcc aga aag ggc tca aag ata gag atc ggg ttt cag aga ctg ttt 594 Leu Ala Arg Lys Gly Ser Lys Ile Glu Ile Gly Phe Gln Arg Leu Phe 75 80 85 gct cgc atg ttc ccc aga gac gga aat ctc ata ccc atg gat agc acg 642 Ala Arg Met Phe Pro Arg Asp Gly Asn Leu Ile Pro Met Asp Ser Thr 90 95 100 atg acc aga atg ata atg aag ata atc aga gac tcg ggt acc aaa tac 690 Met Thr Arg Met Ile Met Lys Ile Ile Arg Asp Ser Gly Thr Lys Tyr 105 110 115 aag ctg gga atc cca ctg ctt gga atc tcg gag gaa atg atc aag aaa 738 Lys Leu Gly Ile Pro Leu Leu Gly Ile Ser Glu Glu Met Ile Lys Lys 120 125 130 ggg gcc atg gtt ccc agc aac ctc gta tat agc ttc aac tgc ttt ctc 786 Gly Ala Met Val Pro Ser Asn Leu Val Tyr Ser Phe Asn Cys Phe Leu 135 140 145 150 aac atc ata tac ggg aga tca gaa tgg ata agg tca gaa ggt att gcc 834 Asn Ile Ile Tyr Gly Arg Ser Glu Trp Ile Arg Ser Glu Gly Ile Ala 155 160 165 att cgt ttc aaa atg tat gaa cat gga cga ttc atc agg aga gac ttg 882 Ile Arg Phe Lys Met Tyr Glu His Gly Arg Phe Ile Arg Arg Asp Leu 170 175 180 acg atc agc gag aaa gag tac aac ttc atc gtc ggg aag gag gtg gtc 930 Thr Ile Ser Glu Lys Glu Tyr Asn Phe Ile Val Gly Lys Glu Val Val 185 190 195 gag ata aga gca tcg agg aga aag gag aga ttc ata gca gat tac aac 978 Glu Ile Arg Ala Ser Arg Arg Lys Glu Arg Phe Ile Ala Asp Tyr Asn 200 205 210 tct ctc tta ctg ctg ttg gat gtt gca gga caa cga ata tgt gca cat 1026 Ser Leu Leu Leu Leu Leu Asp Val Ala Gly Gln Arg Ile Cys Ala His 215 220 225 230 cta tgt tct cag ctc ggg gaa ata tcc ggt gtt cca ggt tca ctc tct 1074 Leu Cys Ser Gln Leu Gly Glu Ile Ser Gly Val Pro Gly Ser Leu Ser 235 240 245 cga tac cat ctg gag act cta tgt act gcc ggg gat aga atg ata gaa 1122 Arg Tyr His Leu Glu Thr Leu Cys Thr Ala Gly Asp Arg Met Ile Glu 250 255 260 aga tgc ggt aac aag gca tac gag gtt cta gga atg tat gag gct ctc 1170 Arg Cys Gly Asn Lys Ala Tyr Glu Val Leu Gly Met Tyr Glu Ala Leu 265 270 275 tgc gtg gga agg ctc ttg gaa aac aac cca gac gga ata aca gac cat 1218 Cys Val Gly Arg Leu Leu Glu Asn Asn Pro Asp Gly Ile Thr Asp His 280 285 290 aca cag ttc tct gcg aac tgt gaa gag gaa cta cag gag cta att gcc 1266 Thr Gln Phe Ser Ala Asn Cys Glu Glu Glu Leu Gln Glu Leu Ile Ala 295 300 305 310 ggg tct gtc gaa cca gca ttc atg aag agt cag gtg gat ttg atc aaa 1314 Gly Ser Val Glu Pro Ala Phe Met Lys Ser Gln Val Asp Leu Ile Lys 315 320 325 act aca ctg gag aag atg aaa aat cag gat ata tcg aac gct ttc tgt 1362 Thr Thr Leu Glu Lys Met Lys Asn Gln Asp Ile Ser Asn Ala Phe Cys 330 335 340 cta tac aga gtc tgg gga cat cca aca gtg gac ata tat gag ggg atg 1410 Leu Tyr Arg Val Trp Gly His Pro Thr Val Asp Ile Tyr Glu Gly Met 345 350 355 aaa aaa gtg cat act ata ggg aca aaa gtg aag gtg att cct ccg aat 1458 Lys Lys Val His Thr Ile Gly Thr Lys Val Lys Val Ile Pro Pro Asn 360 365 370 cta gga aca atc atg gta tgc caa ttc agg aag atg ttc atg tca acc 1506 Leu Gly Thr Ile Met Val Cys Gln Phe Arg Lys Met Phe Met Ser Thr 375 380 385 390 ttc ttc aag aag cat cat agg tac cca ccc atc acg gga acc cca gga 1554 Phe Phe Lys Lys His His Arg Tyr Pro Pro Ile Thr Gly Thr Pro Gly 395 400 405 gaa tat cta gag aga tgt cta aag gac aat gtc gcg atc agg ata gag 1602 Glu Tyr Leu Glu Arg Cys Leu Lys Asp Asn Val Ala Ile Arg Ile Glu 410 415 420 cac ctt gca tac aat cta aga gac ttc gag ttc atc aga ata ggg gag 1650 His Leu Ala Tyr Asn Leu Arg Asp Phe Glu Phe Ile Arg Ile Gly Glu 425 430 435 aca tac agt gtt cca gac aca ttc gat atg tgt cat gtg ctc aat gac 1698 Thr Tyr Ser Val Pro Asp Thr Phe Asp Met Cys His Val Leu Asn Asp 440 445 450 aaa gca gtc agt ccc gac atg tca gag ctc tta gag tca ata aag aac 1746 Lys Ala Val Ser Pro Asp Met Ser Glu Leu Leu Glu Ser Ile Lys Asn 455 460 465 470 ggg aaa gga act agt tgt gga gca aaa aga agg gga ata ttg aga tgg 1794 Gly Lys Gly Thr Ser Cys Gly Ala Lys Arg Arg Gly Ile Leu Arg Trp 475 480 485 atg gag gga gac agt ctg aac tgt aaa tca ttt ctc tca gac att gat 1842 Met Glu Gly Asp Ser Leu Asn Cys Lys Ser Phe Leu Ser Asp Ile Asp 490 495 500 gaa aag gga ctg agc gag gag gat ctt ctg ata gga atg tat gag aag 1890 Glu Lys Gly Leu Ser Glu Glu Asp Leu Leu Ile Gly Met Tyr Glu Lys 505 510 515 gag cga gag atc aag gtt gct gct aga atg tac tct ctg atg aca gag 1938 Glu Arg Glu Ile Lys Val Ala Ala Arg Met Tyr Ser Leu Met Thr Glu 520 525 530 agg atg aga tac tat ttt gtc ttg act gaa ggg ctc att gca gac tac 1986 Arg Met Arg Tyr Tyr Phe Val Leu Thr Glu Gly Leu Ile Ala Asp Tyr 535 540 545 550 ata ctg ccc cat ttc cct gag atc aca atg aag gac agc ctg aac gta 2034 Ile Leu Pro His Phe Pro Glu Ile Thr Met Lys Asp Ser Leu Asn Val 555 560 565 tta ctg aag aag atg tgg gag tct gga gga cag aga agt ata gga tca 2082 Leu Leu Lys Lys Met Trp Glu Ser Gly Gly Gln Arg Ser Ile Gly Ser 570 575 580 atg gat gtg aac ata aac atc gac ttc tcc aag tgg aat aca aac atg 2130 Met Asp Val Asn Ile Asn Ile Asp Phe Ser Lys Trp Asn Thr Asn Met 585 590 595 aga gaa ggg ccc acc agt gac aca ttc aga gag atg gac gga ata ttt 2178 Arg Glu Gly Pro Thr Ser Asp Thr Phe Arg Glu Met Asp Gly Ile Phe 600 605 610 ggg ttc aaa agg ttg ata gcc aga aca cat gag atc ttc aat gca tct 2226 Gly Phe Lys Arg Leu Ile Ala Arg Thr His Glu Ile Phe Asn Ala Ser 615 620 625 630 ctg gtc tat tca gca tca ggg aag tac ctt cct acc atc gag gac ggt 2274 Leu Val Tyr Ser Ala Ser Gly Lys Tyr Leu Pro Thr Ile Glu Asp Gly 635 640 645 aga atc cta gat gat cct ccc atg tgt tac aga ggg cac cta gga ggg 2322 Arg Ile Leu Asp Asp Pro Pro Met Cys Tyr Arg Gly His Leu Gly Gly 650 655 660 ttc gag ggg ctg agg cag aag gga tgg aca gta gca act gta tgc ttg 2370 Phe Glu Gly Leu Arg Gln Lys Gly Trp Thr Val Ala Thr Val Cys Leu 665 670 675 ctc gca tat ctc tca gag cag aac aag atc cag atg aag ttg atg gga 2418 Leu Ala Tyr Leu Ser Glu Gln Asn Lys Ile Gln Met Lys Leu Met Gly 680 685 690 cag ggt gac aat cag atc atc agg cta agg atg ccg acc agc tac tgg 2466 Gln Gly Asp Asn Gln Ile Ile Arg Leu Arg Met Pro Thr Ser Tyr Trp 695 700 705 710 gat agc tta cga ctc aca gag gag atg aag aag aag gag gcc agg att 2514 Asp Ser Leu Arg Leu Thr Glu Glu Met Lys Lys Lys Glu Ala Arg Ile 715 720 725 cta tct gac aag ttc gtg cat gag atg gac ata ata ttc aca gga gta 2562 Leu Ser Asp Lys Phe Val His Glu Met Asp Ile Ile Phe Thr Gly Val 730 735 740 gga ctt ccg atc aag gtc aga gag aca tgg aaa tcg aca cga ctt ttc 2610 Gly Leu Pro Ile Lys Val Arg Glu Thr Trp Lys Ser Thr Arg Leu Phe 745 750 755 atg tac gga aag gta atg cta tta gac gga cgg cag ctc cct caa tgg 2658 Met Tyr Gly Lys Val Met Leu Leu Asp Gly Arg Gln Leu Pro Gln Trp 760 765 770 tat aag aaa act ctc aga tca tat gct cta agc aat gag gga acc ctg 2706 Tyr Lys Lys Thr Leu Arg Ser Tyr Ala Leu Ser Asn Glu Gly Thr Leu 775 780 785 790 aca atc agt ggg gtg atc gga acc atc gct acc aac atg tgt gcg gca 2754 Thr Ile Ser Gly Val Ile Gly Thr Ile Ala Thr Asn Met Cys Ala Ala 795 800 805 gga gga gga agt gaa gtg ccc tgt gtt atg tat ctc ttc ttc ttg ttg 2802 Gly Gly Gly Ser Glu Val Pro Cys Val Met Tyr Leu Phe Phe Leu Leu 810 815 820 ttg gcg gag tgg tca ctc gag ttc atg ttc agg tat cat ccg ttc aca 2850 Leu Ala Glu Trp Ser Leu Glu Phe Met Phe Arg Tyr His Pro Phe Thr 825 830 835 agg gtt ggg atc aag gat ggg agt tca atg gag ttt cga ctg aac gag 2898 Arg Val Gly Ile Lys Asp Gly Ser Ser Met Glu Phe Arg Leu Asn Glu 840 845 850 aag gga gga tat gtt cat aag cag act cga aag aca aac aat ctg tgg 2946 Lys Gly Gly Tyr Val His Lys Gln Thr Arg Lys Thr Asn Asn Leu Trp 855 860 865 870 ctg aag tcc ctc ttg gtc cta gtg cct act gcc gtg gga gga agt gtt 2994 Leu Lys Ser Leu Leu Val Leu Val Pro Thr Ala Val Gly Gly Ser Val 875 880 885 act att cct ctc acc gga ttc ata atg aga gga ttt cct gac aaa gct 3042 Thr Ile Pro Leu Thr Gly Phe Ile Met Arg Gly Phe Pro Asp Lys Ala 890 895 900 tca gag ggt tat gcg tgg ctg aaa ttc tta ggg tca tca aag tct cct 3090 Ser Glu Gly Tyr Ala Trp Leu Lys Phe Leu Gly Ser Ser Lys Ser Pro 905 910 915 atc cag ggc ttc ctg aag aac ttc tat acc ttc ctt ccc aac gat acc 3138 Ile Gln Gly Phe Leu Lys Asn Phe Tyr Thr Phe Leu Pro Asn Asp Thr 920 925 930 gta gaa gcc gac atg tta gtg cag tcc cct ttc tct ctg aac cat aag 3186 Val Glu Ala Asp Met Leu Val Gln Ser Pro Phe Ser Leu Asn His Lys 935 940 945 950 aga cct cca aca ccc ggg tta caa acg aaa gag aac ata aga gaa tgg 3234 Arg Pro Pro Thr Pro Gly Leu Gln Thr Lys Glu Asn Ile Arg Glu Trp 955 960 965 ctg ctt tca aca ccg aga ttc caa cag aac cga ttc att cga agc atg 3282 Leu Leu Ser Thr Pro Arg Phe Gln Gln Asn Arg Phe Ile Arg Ser Met 970 975 980 cag gtt ctc cta tca ggg ttt gac aag aaa agt gtt tgc cgt gaa ctc 3330 Gln Val Leu Leu Ser Gly Phe Asp Lys Lys Ser Val Cys Arg Glu Leu 985 990 995 cta acg gag aga atg aat ccg ctg atc agt cac gaa gtc tat gag acc 3378 Leu Thr Glu Arg Met Asn Pro Leu Ile Ser His Glu Val Tyr Glu Thr 1000 1005 1010 ttt ggg cat gtt tac tgt gag ggg atc gta gcc agg gta gag aac act 3426 Phe Gly His Val Tyr Cys Glu Gly Ile Val Ala Arg Val Glu Asn Thr 1015 1020 1025 1030 cga acg ata cga aca ctt cat ctc agc aga gag gac aga aag cca atc 3474 Arg Thr Ile Arg Thr Leu His Leu Ser Arg Glu Asp Arg Lys Pro Ile 1035 1040 1045 gtg gca aag cta atg act gat gag atg gca tac ata gca tat atg tgg 3522 Val Ala Lys Leu Met Thr Asp Glu Met Ala Tyr Ile Ala Tyr Met Trp 1050 1055 1060 tgg agg ggg aat act aag ggt gaa gtt ttt gag gaa tgt gca aca aag 3570 Trp Arg Gly Asn Thr Lys Gly Glu Val Phe Glu Glu Cys Ala Thr Lys 1065 1070 1075 cag gct cgg aaa ggt aga aat gtt ggc tgg aaa aga gag atc atg gga 3618 Gln Ala Arg Lys Gly Arg Asn Val Gly Trp Lys Arg Glu Ile Met Gly 1080 1085 1090 att acc aca cct cat cct ctg gaa gtg cta ttc caa agt gta tgc aga 3666 Ile Thr Thr Pro His Pro Leu Glu Val Leu Phe Gln Ser Val Cys Arg 1095 1100 1105 1110 cct ggg gac caa tgc caa aga tca gat gac tac atc aca tcg aag ctt 3714 Pro Gly Asp Gln Cys Gln Arg Ser Asp Asp Tyr Ile Thr Ser Lys Leu 1115 1120 1125 gta gac gac ggg aag ttt ccc cca ttc ctt ggg agc aag atc aag aac 3762 Val Asp Asp Gly Lys Phe Pro Pro Phe Leu Gly Ser Lys Ile Lys Asn 1130 1135 1140 aag gtg tac tcg ctg cag gac gaa gaa gcg aga aga gaa cca ctg atc 3810 Lys Val Tyr Ser Leu Gln Asp Glu Glu Ala Arg Arg Glu Pro Leu Ile 1145 1150 1155 aaa acc ggg gct aga ttg gcc aga cag ttc aat tgg atc gga atg gga 3858 Lys Thr Gly Ala Arg Leu Ala Arg Gln Phe Asn Trp Ile Gly Met Gly 1160 1165 1170 gag aat atg aga gga ttg gtc tta aag aat gta ggg tcc ata tgc gat 3906 Glu Asn Met Arg Gly Leu Val Leu Lys Asn Val Gly Ser Ile Cys Asp 1175 1180 1185 1190 gtg tca gta ttt gac aag ttc gtt gat gat gat ccc tca gac aac cta 3954 Val Ser Val Phe Asp Lys Phe Val Asp Asp Asp Pro Ser Asp Asn Leu 1195 1200 1205 tac act ggg tct ctc atg cac agg ttt acc ccc tcc tct gtc tct gaa 4002 Tyr Thr Gly Ser Leu Met His Arg Phe Thr Pro Ser Ser Val Ser Glu 1210 1215 1220 ggc tgc ttc atc aac tat gca cct caa gtc ggt cac aag gtc ttc atg 4050 Gly Cys Phe Ile Asn Tyr Ala Pro Gln Val Gly His Lys Val Phe Met 1225 1230 1235 tct tca gat aca ctc ccc tct ctc tcc aga ggc cag aca aac tac aca 4098 Ser Ser Asp Thr Leu Pro Ser Leu Ser Arg Gly Gln Thr Asn Tyr Thr 1240 1245 1250 ttt cat ttc caa gca atg tac tgc ttt ctt caa tac agc ata tcc aaa 4146 Phe His Phe Gln Ala Met Tyr Cys Phe Leu Gln Tyr Ser Ile Ser Lys 1255 1260 1265 1270 tca ggg aat gaa gga tca tac cat cat cat atc atg tgc caa gac tgt 4194 Ser Gly Asn Glu Gly Ser Tyr His His His Ile Met Cys Gln Asp Cys 1275 1280 1285 gta gtc cct gtc gaa gat gaa ttc gat gac atc cct aat gaa act cca 4242 Val Val Pro Val Glu Asp Glu Phe Asp Asp Ile Pro Asn Glu Thr Pro 1290 1295 1300 agc ata gta aag gca caa gaa gag caa tac gtc tcg ata atc aga aca 4290 Ser Ile Val Lys Ala Gln Glu Glu Gln Tyr Val Ser Ile Ile Arg Thr 1305 1310 1315 acg tta ggg tac att cat acg aag ccc agg agt gcg atg gtc ttg gag 4338 Thr Leu Gly Tyr Ile His Thr Lys Pro Arg Ser Ala Met Val Leu Glu 1320 1325 1330 gac aag agc ccc ata gga aga tac atc gag gat gtg gaa gga cac gag 4386 Asp Lys Ser Pro Ile Gly Arg Tyr Ile Glu Asp Val Glu Gly His Glu 1335 1340 1345 1350 aag gaa cta tac tca ggg gtt gtc gag tta ctg tgc tgg aaa tcc gca 4434 Lys Glu Leu Tyr Ser Gly Val Val Glu Leu Leu Cys Trp Lys Ser Ala 1355 1360 1365 ttg gag atc tta ggt aga aca aga gac act cat gca aca gtc ggg aca 4482 Leu Glu Ile Leu Gly Arg Thr Arg Asp Thr His Ala Thr Val Gly Thr 1370 1375 1380 gaa gac cta cag ggg tgg ccc aga ata tac gcc tat aag gtc tca aga 4530 Glu Asp Leu Gln Gly Trp Pro Arg Ile Tyr Ala Tyr Lys Val Ser Arg 1385 1390 1395 agg cac atc ata gga aag gtg acc tca ttc atc cta tac atc ctg gca 4578 Arg His Ile Ile Gly Lys Val Thr Ser Phe Ile Leu Tyr Ile Leu Ala 1400 1405 1410 gta caa ata gga gag ctc cct ctt cct tac agc atg gag aga gtt agc 4626 Val Gln Ile Gly Glu Leu Pro Leu Pro Tyr Ser Met Glu Arg Val Ser 1415 1420 1425 1430 cga cga gcg ata gat gta gtc tca cga gtc ggt ctt gag gga ttt tct 4674 Arg Arg Ala Ile Asp Val Val Ser Arg Val Gly Leu Glu Gly Phe Ser 1435 1440 1445 gca gtt gcc tct ctt tgt cta ggg aga gat atc ccg atg gtg aat gat 4722 Ala Val Ala Ser Leu Cys Leu Gly Arg Asp Ile Pro Met Val Asn Asp 1450 1455 1460 gtc gtg acc atc gta gat ggg ttt gct tat cca gag act gtg tcc gtc 4770 Val Val Thr Ile Val Asp Gly Phe Ala Tyr Pro Glu Thr Val Ser Val 1465 1470 1475 tgc ctc aga tcc atc aag gca tct atc ctt atg acc ata ggc aag gtg 4818 Cys Leu Arg Ser Ile Lys Ala Ser Ile Leu Met Thr Ile Gly Lys Val 1480 1485 1490 atc aga gtg gat ggt ttc atg tcg aga agg agt gta tat ccg aca gag 4866 Ile Arg Val Asp Gly Phe Met Ser Arg Arg Ser Val Tyr Pro Thr Glu 1495 1500 1505 1510 tca atg acc tcg gac gat ttt ctg agg atc ttg gga ttc aag gct gtc 4914 Ser Met Thr Ser Asp Asp Phe Leu Arg Ile Leu Gly Phe Lys Ala Val 1515 1520 1525 atc ttc tat ggg tgc aca aag atc cac gaa aag tgc caa cta aag gga 4962 Ile Phe Tyr Gly Cys Thr Lys Ile His Glu Lys Cys Gln Leu Lys Gly 1530 1535 1540 ctt gac caa gtg acc tac gca gaa atg atg tgt cat cat aga tgt cta 5010 Leu Asp Gln Val Thr Tyr Ala Glu Met Met Cys His His Arg Cys Leu 1545 1550 1555 gag aaa ctc cta tct tcc aac ctc cta acc cac atg acc atg gac aga 5058 Glu Lys Leu Leu Ser Ser Asn Leu Leu Thr His Met Thr Met Asp Arg 1560 1565 1570 gcc atg aag tat cta ccc atc aaa atc acc aaa att ctc cct aag atc 5106 Ala Met Lys Tyr Leu Pro Ile Lys Ile Thr Lys Ile Leu Pro Lys Ile 1575 1580 1585 1590 tct tcc aca aga ccg aac aca att gcc gtg aca aga gaa gta gag act 5154 Ser Ser Thr Arg Pro Asn Thr Ile Ala Val Thr Arg Glu Val Glu Thr 1595 1600 1605 gag aat cga gag ttt tcc gac acc ttc ccc att gat gag aga gtg aca 5202 Glu Asn Arg Glu Phe Ser Asp Thr Phe Pro Ile Asp Glu Arg Val Thr 1610 1615 1620 tat cca gaa atg gat ctc aaa acc aat cag atg atc cag tat ccc aca 5250 Tyr Pro Glu Met Asp Leu Lys Thr Asn Gln Met Ile Gln Tyr Pro Thr 1625 1630 1635 tca agc ata tac aaa tgg agt gac atc ctt ctc gga att gaa cat tac 5298 Ser Ser Ile Tyr Lys Trp Ser Asp Ile Leu Leu Gly Ile Glu His Tyr 1640 1645 1650 gat cat gta gta gtc atg gga gat ggc act gga ggt aca tca atg gtt 5346 Asp His Val Val Val Met Gly Asp Gly Thr Gly Gly Thr Ser Met Val 1655 1660 1665 1670 gct gcg cac atg ttc ccg aac tcc acc ata tat cct atg gca ctc cta 5394 Ala Ala His Met Phe Pro Asn Ser Thr Ile Tyr Pro Met Ala Leu Leu 1675 1680 1685 gaa agt aag aat ctg atc cct caa gac atg gaa tca ctt gcc cct cct 5442 Glu Ser Lys Asn Leu Ile Pro Gln Asp Met Glu Ser Leu Ala Pro Pro 1690 1695 1700 atg tcc agg aag ctt aca aat gta gat tca tcc ctc ctg atc gat ctc 5490 Met Ser Arg Lys Leu Thr Asn Val Asp Ser Ser Leu Leu Ile Asp Leu 1705 1710 1715 cct gat gac atc aga aag ccc aca ttc agg act agg atg cta gag aga 5538 Pro Asp Asp Ile Arg Lys Pro Thr Phe Arg Thr Arg Met Leu Glu Arg 1720 1725 1730 gta tcg ctc atg cga gga aac att ctc atc atc tct gac att gag gga 5586 Val Ser Leu Met Arg Gly Asn Ile Leu Ile Ile Ser Asp Ile Glu Gly 1735 1740 1745 1750 act gga aca ttg ttc agg gac ata gta tcc aca tgt cta tac atg cct 5634 Thr Gly Thr Leu Phe Arg Asp Ile Val Ser Thr Cys Leu Tyr Met Pro 1755 1760 1765 aca tca acg gat gtt ctc atg aaa aca cat cta gca gac ctc tgt gga 5682 Thr Ser Thr Asp Val Leu Met Lys Thr His Leu Ala Asp Leu Cys Gly 1770 1775 1780 tca tat tac atg atg aag ggt gca gga agg att agg ctc aga ggt agt 5730 Ser Tyr Tyr Met Met Lys Gly Ala Gly Arg Ile Arg Leu Arg Gly Ser 1785 1790 1795 cgg ttg gcg aac ctc aga tat gga gaa gta ttc gtc tca ttc aga gtc 5778 Arg Leu Ala Asn Leu Arg Tyr Gly Glu Val Phe Val Ser Phe Arg Val 1800 1805 1810 acc gga ggg aac atc aga ccg aac aga aga ggg ctg ggg aac tgc att 5826 Thr Gly Gly Asn Ile Arg Pro Asn Arg Arg Gly Leu Gly Asn Cys Ile 1815 1820 1825 1830 cag gag gtg atg atc ggg ctc atg aat acc cag ata gag aca gca act 5874 Gln Glu Val Met Ile Gly Leu Met Asn Thr Gln Ile Glu Thr Ala Thr 1835 1840 1845 gga atg ctc tcg cag atc gag tcc atg ttc ccc ttg gct gct gac atg 5922 Gly Met Leu Ser Gln Ile Glu Ser Met Phe Pro Leu Ala Ala Asp Met 1850 1855 1860 agc atg aac ata gct atg atg aag atg gcc tca tgg gga gga tca ttc 5970 Ser Met Asn Ile Ala Met Met Lys Met Ala Ser Trp Gly Gly Ser Phe 1865 1870 1875 tcg agg aag gtt ctg gga gaa gat ggg ctc aag ctg atg gga tat gtc 6018 Ser Arg Lys Val Leu Gly Glu Asp Gly Leu Lys Leu Met Gly Tyr Val 1880 1885 1890 tac caa tac atc aat aca cac tac cat ttt gcc tca tcc tct tac agg 6066 Tyr Gln Tyr Ile Asn Thr His Tyr His Phe Ala Ser Ser Ser Tyr Arg 1895 1900 1905 1910 ccc gga gac aac aga aca gta aca cca agg aga aaa gag gat ctg acc 6114 Pro Gly Asp Asn Arg Thr Val Thr Pro Arg Arg Lys Glu Asp Leu Thr 1915 1920 1925 aag ctc ctg tgc tcc att atg ttg ggg gtt tat gga gaa gat aca gag 6162 Lys Leu Leu Cys Ser Ile Met Leu Gly Val Tyr Gly Glu Asp Thr Glu 1930 1935 1940 act att gag gaa gtg tcg aag tat acg ttg atc ggg agc aag aaa gga 6210 Thr Ile Glu Glu Val Ser Lys Tyr Thr Leu Ile Gly Ser Lys Lys Gly 1945 1950 1955 gta cca gga aag agt tac ttc aag gtt ctg atg tgg aaa act ggg acc 6258 Val Pro Gly Lys Ser Tyr Phe Lys Val Leu Met Trp Lys Thr Gly Thr 1960 1965 1970 aag aga gcc ttg gaa cac gat gag tac atg gtt ggg aga gca ata agg 6306 Lys Arg Ala Leu Glu His Asp Glu Tyr Met Val Gly Arg Ala Ile Arg 1975 1980 1985 1990 aac tac cgc acc aga att ctg gag gcc aag aaa ctg gat gga cct ata 6354 Asn Tyr Arg Thr Arg Ile Leu Glu Ala Lys Lys Leu Asp Gly Pro Ile 1995 2000 2005 gga ttg cca ttc cat agt gga tcc cta agg aag att gcc acc tgg gga 6402 Gly Leu Pro Phe His Ser Gly Ser Leu Arg Lys Ile Ala Thr Trp Gly 2010 2015 2020 tac aag att cca ata tct gca agc ggt gga tgg ata gac aat cac cta 6450 Tyr Lys Ile Pro Ile Ser Ala Ser Gly Gly Trp Ile Asp Asn His Leu 2025 2030 2035 cag atc tga ggacccttgg aggatgaatg atgttgtgaa tagggagcac 6499 Gln Ile 2040 gaatgtatga gcagacgatg aataagtccc aaatattaga aaaaacgaac ccagatagct 6559 cagtgactgt taattcctgc acaggctaat ggatcaagat atctagacaa catccaaagt 6619 cggaagtagg gaaaatatcc gagcgtgtga acattggaaa aaatcaaaga cgaaaccccc 6679 gggaataata aaacgttgga gtctcccagc ccgctaaagc aagttgagtt ctaacaaagc 6739 cgtgttagtc ggggtcttga tttttatgat tttgttgtgc tgtgtttgcg accg 6793 13 2040 PRT Lettuce Big-vein Virus 13 Met Ser Leu Ala Ser Arg Met Thr Ser Val Gly Gly Ala Asp Asn Tyr 1 5 10 15 Gly Glu Ser Asp Tyr Gly Trp Asp Glu Thr Val Leu Gly Asp Met His 20 25 30 Leu Asn Ser Ala Ile Asn Leu Asp Leu Phe Lys Glu Phe Leu His Ile 35 40 45 Asp Pro Pro Val Tyr Lys Val Lys Glu Asn His Arg Leu Thr Glu Glu 50 55 60 Leu Arg Glu Leu Gln Ser Leu Ala Arg Lys Gly Ser Lys Ile Glu Ile 65 70 75 80 Gly Phe Gln Arg Leu Phe Ala Arg Met Phe Pro Arg Asp Gly Asn Leu 85 90 95 Ile Pro Met Asp Ser Thr Met Thr Arg Met Ile Met Lys Ile Ile Arg 100 105 110 Asp Ser Gly Thr Lys Tyr Lys Leu Gly Ile Pro Leu Leu Gly Ile Ser 115 120 125 Glu Glu Met Ile Lys Lys Gly Ala Met Val Pro Ser Asn Leu Val Tyr 130 135 140 Ser Phe Asn Cys Phe Leu Asn Ile Ile Tyr Gly Arg Ser Glu Trp Ile 145 150 155 160 Arg Ser Glu Gly Ile Ala Ile Arg Phe Lys Met Tyr Glu His Gly Arg 165 170 175 Phe Ile Arg Arg Asp Leu Thr Ile Ser Glu Lys Glu Tyr Asn Phe Ile 180 185 190 Val Gly Lys Glu Val Val Glu Ile Arg Ala Ser Arg Arg Lys Glu Arg 195 200 205 Phe Ile Ala Asp Tyr Asn Ser Leu Leu Leu Leu Leu Asp Val Ala Gly 210 215 220 Gln Arg Ile Cys Ala His Leu Cys Ser Gln Leu Gly Glu Ile Ser Gly 225 230 235 240 Val Pro Gly Ser Leu Ser Arg Tyr His Leu Glu Thr Leu Cys Thr Ala 245 250 255 Gly Asp Arg Met Ile Glu Arg Cys Gly Asn Lys Ala Tyr Glu Val Leu 260 265 270 Gly Met Tyr Glu Ala Leu Cys Val Gly Arg Leu Leu Glu Asn Asn Pro 275 280 285 Asp Gly Ile Thr Asp His Thr Gln Phe Ser Ser Asn Cys Glu Glu Glu 290 295 300 Leu Gln Glu Leu Ile Ala Gly Ser Val Glu Pro Ala Phe Met Lys Ser 305 310 315 320 Gln Val Asp Leu Ile Lys Thr Thr Leu Glu Lys Met Lys Asn Gln Asp 325 330 335 Ile Ser Asn Ala Phe Cys Leu Tyr Arg Val Trp Gly His Pro Thr Val 340 345 350 Asp Ile Tyr Glu Gly Met Lys Lys Val His Thr Ile Gly Thr Lys Val 355 360 365 Lys Val Ile Pro Pro Asn Leu Gly Thr Ile Met Val Cys Gln Phe Arg 370 375 380 Lys Met Phe Met Ala Thr Phe Phe Lys Lys His His Arg Tyr Pro Pro 385 390 395 400 Ile Thr Gly Thr Pro Gly Glu Tyr Leu Glu Arg Cys Leu Lys Asp Asn 405 410 415 Val Ala Ile Arg Ile Glu His Leu Ala Tyr Asn Leu Arg Asp Phe Glu 420 425 430 Phe Ile Arg Ile Gly Glu Thr Tyr Ser Val Pro Asp Thr Phe Asp Met 435 440 445 Cys His Val Leu Asn Asp Lys Ala Val Ser Pro Asp Met Ser Glu Leu 450 455 460 Leu Glu Ser Ile Lys Asn Gly Lys Gly Thr Ser Cys Gly Ala Lys Arg 465 470 475 480 Arg Gly Ile Leu Arg Trp Met Glu Gly Asp Ser Leu Asn Cys Lys Ser 485 490 495 Phe Leu Ser Asp Ile Asp Glu Lys Gly Leu Ser Glu Glu Asp Leu Leu 500 505 510 Ile Gly Met Tyr Glu Lys Glu Arg Glu Ile Lys Val Ala Ala Arg Met 515 520 525 Tyr Ser Leu Met Thr Glu Arg Met Arg Tyr Tyr Phe Val Leu Thr Glu 530 535 540 Gly Leu Ile Ala Asp Tyr Ile Leu Pro His Phe Pro Glu Ile Thr Met 545 550 555 560 Lys Asp Ser Leu Asn Val Leu Leu Lys Lys Met Trp Glu Ser Gly Gly 565 570 575 Gln Arg Ser Ile Gly Ser Met Asp Val Asn Ile Asn Ile Asp Phe Ser 580 585 590 Lys Trp Asn Thr Asn Met Arg Glu Gly Pro Thr Ser Asp Thr Phe Arg 595 600 605 Glu Met Asp Gly Ile Phe Gly Phe Lys Arg Leu Ile Ala Arg Thr His 610 615 620 Glu Ile Phe Asn Ala Ser Leu Val Tyr Ser Ala Ser Gly Lys Tyr Leu 625 630 635 640 Pro Thr Ile Glu Asp Gly Arg Ile Leu Asp Asp Pro Pro Met Cys Tyr 645 650 655 Arg Gly His Leu Gly Gly Phe Glu Gly Leu Arg Gln Lys Gly Trp Thr 660 665 670 Val Ala Thr Val Cys Leu Leu Ala Tyr Leu Ser Glu Gln Asn Lys Ile 675 680 685 Gln Met Lys Leu Met Gly Gln Gly Asp Asn Gln Ile Ile Arg Leu Arg 690 695 700 Met Pro Thr Ser Tyr Trp Asp Ser Leu Arg Leu Thr Glu Glu Met Lys 705 710 715 720 Lys Lys Glu Ala Arg Ile Leu Ser Asp Lys Phe Val His Glu Met Asp 725 730 735 Ile Ile Phe Thr Gly Val Gly Leu Pro Ile Lys Val Arg Glu Thr Trp 740 745 750 Lys Ser Thr Arg Leu Phe Met Tyr Gly Lys Val Met Leu Leu Asp Gly 755 760 765 Arg Gln Leu Pro Gln Trp Tyr Lys Lys Thr Leu Arg Ser Tyr Ala Leu 770 775 780 Ser Asn Glu Gly Thr Leu Thr Ile Ser Gly Val Ile Gly Thr Ile Ala 785 790 795 800 Thr Asn Met Cys Ala Ala Gly Gly Gly Ser Glu Val Pro Cys Val Met 805 810 815 Tyr Leu Phe Phe Leu Leu Leu Ala Glu Trp Ser Leu Glu Phe Met Phe 820 825 830 Arg Tyr His Pro Phe Thr Arg Val Gly Ile Lys Asp Gly Ser Ser Met 835 840 845 Glu Phe Arg Leu Asn Glu Lys Gly Gly Tyr Val His Lys Gln Thr Arg 850 855 860 Lys Thr Asn Asn Leu Trp Leu Lys Ser Leu Leu Val Leu Val Pro Thr 865 870 875 880 Ala Val Gly Gly Ser Val Thr Ile Pro Leu Thr Gly Phe Ile Met Arg 885 890 895 Gly Phe Pro Asp Lys Ala Ser Glu Gly Tyr Ala Trp Leu Lys Phe Leu 900 905 910 Gly Ser Ser Lys Ser Pro Ile Gln Gly Phe Leu Lys Asn Phe Tyr Thr 915 920 925 Phe Leu Pro Asn Asp Thr Val Glu Ala Asp Met Leu Val Gln Ser Pro 930 935 940 Phe Ser Leu Thr His Lys Arg Pro Pro Thr Pro Gly Leu Gln Thr Lys 945 950 955 960 Glu Asn Ile Arg Glu Trp Leu Leu Ser Thr Pro Arg Phe Gln Gln Asn 965 970 975 Arg Phe Ile Arg Ser Met Gln Val Leu Leu Ser Gly Phe Asp Lys Lys 980 985 990 Ser Val Cys Arg Glu Leu Leu Thr Glu Arg Met Asn Pro Leu Ile Ser 995 1000 1005 His Glu Val Tyr Glu Thr Phe Gly His Val Tyr Cys Glu Gly Ile Val 1010 1015 1020 Ala Arg Val Glu Asn Thr Arg Thr Ile Arg Thr Leu His Leu Ser Arg 1025 1030 1035 1040 Glu Asp Arg Lys Pro Ile Val Ala Lys Leu Met Thr Asp Glu Met Ala 1045 1050 1055 Tyr Ile Ala Tyr Met Trp Trp Arg Gly Asn Thr Lys Gly Glu Val Phe 1060 1065 1070 Glu Glu Cys Ala Thr Lys Gln Ala Arg Lys Gly Arg Asn Val Gly Trp 1075 1080 1085 Lys Arg Glu Ile Val Gly Ile Thr Thr Pro His Pro Leu Glu Val Leu 1090 1095 1100 Phe Gln Ser Val Cys Arg Pro Gly Asp Gln Cys Gln Arg Ser Asp Asp 1105 1110 1115 1120 Tyr Ile Thr Ser Lys Leu Val Asp Asp Gly Lys Phe Pro Pro Phe Leu 1125 1130 1135 Gly Ser Lys Ile Lys Asn Lys Val Tyr Ser Leu Gln Asp Glu Glu Ala 1140 1145 1150 Arg Arg Glu Pro Leu Ile Lys Thr Gly Ala Arg Leu Ala Arg Gln Phe 1155 1160 1165 Asn Trp Ile Gly Met Gly Glu Asn Met Arg Gly Leu Val Leu Lys Asn 1170 1175 1180 Val Gly Ser Ile Cys Asp Val Ser Val Phe Asp Lys Phe Val Asp Asp 1185 1190 1195 1200 Asp Pro Ser Asp Asn Leu Tyr Thr Gly Ser Leu Met His Arg Phe Thr 1205 1210 1215 Pro Ser Ser Val Ser Glu Gly Cys Phe Ile Asn Tyr Ala Pro Gln Val 1220 1225 1230 Gly His Lys Val Phe Met Ser Ser Asp Thr Leu Pro Ser Leu Ser Arg 1235 1240 1245 Gly Gln Thr Asn Tyr Thr Phe His Phe Gln Ala Met Tyr Cys Phe Leu 1250 1255 1260 Gln Tyr Ser Ile Ser Lys Ser Gly Asn Glu Gly Ser Tyr His His His 1265 1270 1275 1280 Ile Met Cys Gln Asp Cys Val Val Pro Val Glu Asp Glu Phe Asp Asp 1285 1290 1295 Ile Pro Asn Glu Thr Pro Ser Ile Val Lys Ala Gln Glu Glu Gln Tyr 1300 1305 1310 Val Ser Ile Ile Arg Thr Thr Leu Gly Tyr Ile His Thr Lys Pro Arg 1315 1320 1325 Ser Ala Met Val Leu Glu Asp Lys Ser Pro Ile Gly Arg Tyr Ile Glu 1330 1335 1340 Asp Val Glu Gly His Glu Lys Glu Leu Tyr Ser Gly Val Val Glu Leu 1345 1350 1355 1360 Leu Cys Trp Lys Ser Ala Leu Glu Ile Leu Gly Arg Thr Arg Asp Thr 1365 1370 1375 His Ala Thr Val Gly Thr Glu Asp Leu Gln Gly Trp Pro Arg Ile Tyr 1380 1385 1390 Ala Tyr Lys Val Ser Arg Arg His Ile Ile Gly Lys Val Thr Ser Phe 1395 1400 1405 Ile Leu Tyr Ile Leu Ala Val Gln Ile Gly Glu Leu Pro Leu Pro Tyr 1410 1415 1420 Ser Met Glu Arg Val Ser Arg Arg Ala Ile Asp Val Val Ser Arg Val 1425 1430 1435 1440 Gly Leu Glu Gly Phe Ser Ala Val Ala Ser Leu Cys Leu Gly Arg Asp 1445 1450 1455 Ile Pro Met Val Asn Asp Val Val Thr Ile Val Asp Gly Phe Ala Tyr 1460 1465 1470 Pro Glu Thr Val Ser Val Cys Leu Arg Ser Ile Lys Ala Ser Ile Leu 1475 1480 1485 Met Thr Ile Gly Lys Val Ile Arg Val Asp Gly Phe Met Ser Arg Arg 1490 1495 1500 Ser Val Tyr Pro Thr Glu Ser Met Thr Ser Asp Asp Phe Leu Arg Ile 1505 1510 1515 1520 Leu Gly Phe Lys Ala Val Ile Phe Tyr Gly Cys Thr Lys Ile His Glu 1525 1530 1535 Lys Cys Gln Leu Lys Gly Leu Asp Gln Val Thr Tyr Ala Glu Met Met 1540 1545 1550 Cys His His Arg Cys Leu Glu Lys Leu Leu Ser Ser Asn Leu Leu Thr 1555 1560 1565 His Met Thr Met Asp Arg Ala Met Lys Tyr Leu Pro Ile Lys Ile Thr 1570 1575 1580 Lys Ile Leu Pro Lys Ile Ser Ser Thr Arg Pro Asn Thr Ile Ala Val 1585 1590 1595 1600 Thr Arg Glu Val Glu Thr Glu Asn Arg Glu Phe Ser Asp Thr Phe Pro 1605 1610 1615 Ile Asp Glu Arg Val Thr Tyr Pro Glu Met Asp Leu Lys Thr Asn Gln 1620 1625 1630 Met Ile Gln Tyr Pro Thr Ser Ser Ile Tyr Lys Trp Ser Asp Ile Leu 1635 1640 1645 Leu Gly Ile Glu His Tyr Asp His Val Val Val Met Gly Asp Gly Thr 1650 1655 1660 Gly Gly Thr Ser Met Val Ala Ala His Met Phe Pro Asn Ser Thr Ile 1665 1670 1675 1680 Tyr Pro Met Ala Leu Leu Glu Ser Lys Asn Leu Ile Pro Gln Asp Met 1685 1690 1695 Glu Ser Leu Ala Pro Pro Met Ser Arg Lys Leu Thr Asn Val Asp Ser 1700 1705 1710 Ser Leu Leu Ile Asp Leu Pro Asp Asp Ile Arg Lys Pro Thr Phe Arg 1715 1720 1725 Thr Arg Met Leu Glu Arg Val Ser Leu Met Arg Gly Asn Ile Leu Ile 1730 1735 1740 Ile Ser Asp Ile Glu Gly Thr Gly Thr Leu Phe Arg Asp Ile Val Ser 1745 1750 1755 1760 Thr Cys Leu Tyr Met Pro Thr Ser Thr Asp Val Leu Met Lys Thr His 1765 1770 1775 Leu Ala Asp Leu Cys Gly Ser Tyr Tyr Met Met Lys Gly Ala Gly Arg 1780 1785 1790 Ile Arg Leu Arg Gly Ser Arg Leu Ala Asn Leu Arg Tyr Gly Glu Val 1795 1800 1805 Phe Val Ser Phe Arg Val Thr Gly Gly Asn Ile Arg Pro Asn Arg Arg 1810 1815 1820 Gly Leu Gly Asn Cys Ile Gln Glu Val Met Ile Gly Leu Met Asn Thr 1825 1830 1835 1840 Gln Ile Glu Thr Ala Thr Gly Met Leu Ser Gln Ile Glu Ser Met Phe 1845 1850 1855 Pro Leu Ala Ala Asp Met Ser Met Asn Ile Ala Met Met Lys Met Ala 1860 1865 1870 Ser Trp Gly Gly Ser Phe Ser Arg Lys Val Leu Gly Glu Asp Gly Leu 1875 1880 1885 Lys Leu Met Gly Tyr Val Tyr Gln Tyr Ile Asn Thr His Tyr His Phe 1890 1895 1900 Ala Ser Ser Ser Tyr Arg Pro Gly Asp Asn Arg Thr Val Thr Pro Arg 1905 1910 1915 1920 Arg Lys Glu Asp Leu Thr Lys Leu Leu Cys Ser Ile Met Leu Gly Val 1925 1930 1935 Tyr Gly Glu Asp Thr Glu Thr Ile Glu Glu Val Ser Lys Tyr Thr Leu 1940 1945 1950 Ile Gly Ser Lys Lys Gly Val Pro Gly Lys Ser Tyr Phe Lys Val Leu 1955 1960 1965 Met Trp Lys Thr Gly Thr Lys Arg Ala Leu Glu His Asp Glu Tyr Met 1970 1975 1980 Val Gly Arg Ala Ile Arg Asn Tyr Arg Thr Arg Ile Leu Glu Ala Lys 1985 1990 1995 2000 Lys Leu Asp Gly Pro Ile Gly Leu Pro Phe His Ser Gly Ser Leu Arg 2005 2010 2015 Lys Ile Ala Thr Trp Gly Tyr Lys Ile Pro Ile Ser Ala Ser Gly Gly 2020 2025 2030 Trp Ile Asp Asn His Leu Gln Ile 2035 2040 14 26 DNA Artificial Sequence Description of Artificial Sequencean artificially synthesized primer sequence 14 gccggagctc tgcagaattc nnnnnn 26 15 20 DNA Artificial Sequence Description of Artificial Sequencean artificially synthesized primer sequence 15 gccggagctc tgcagaattc 20 16 19 DNA Artificial Sequence Description of Artificial Sequencean artificially synthesized primer sequence 16 agctctgaac aacgacatg 19 

1. A nucleic acid encoding a protein of lettuce big-vein virus, said nucleic acid selected from the group consisting of: (a) a nucleic acid encoding a protein comprising the amino acid sequence of any one of SEQ ID NOs: 2 through 6 and SEQ ID NO: 13; and (b) the nucleic acid of (a) comprising the coding region of the nucleotide sequence of SEQ ID NO: 1 or
 12. 2. The nucleic acid according to claim 1, wherein the nucleic acid is an RNA.
 3. The nucleic acid according to claim 1, wherein the nucleic acid is a DNA.
 4. A DNA encoding a sense RNA complementary to a complementary strand of the nucleic acid according to claim
 2. 5. A DNA encoding an antisense RNA complementary to the nucleic acid according to claim
 2. 6. A DNA encoding an RNA having ribozyme activity that specifically cleaves the nucleic acid according to claim
 2. 7. A vector comprising the nucleic acid according to claim
 3. 8. A transformed cell comprising the nucleic acid according to claim 3, or the vector according to claim
 7. 9. A protein encoded by the nucleic acid according to claim
 1. 10. An antibody that binds to the protein of claim
 9. 11. A method of producing the protein according to claim 9, wherein said method comprises the steps of: (a) culturing the transformed cell of claim 8; and (b) recovering an expressed protein from said transformed cell or its culture supernatant.
 12. A vector comprising the DNA according to any one of claims 4 through
 6. 13. A transformed lettuce cell that comprises the nucleic acid according to claim 1, the DNA according to any one of claims 4 through 6, or the vector according to claim 7 or
 12. 14. A transformed lettuce plant comprising the transformed lettuce cell according to claim
 13. 15. A transformed lettuce plant that is a progeny or a clone of the transformed lettuce plant according to claim
 14. 16. A propagation material of the transformed lettuce plant according to claim 14 or
 15. 17. A method of diagnosing infection caused by the lettuce big-vein virus wherein said method comprises the step of: detecting the nucleic acid of claim 1, or detecting the protein of claim 9 in lettuce cells or in Olpidum, a fungal vector of lettuce big-vein virus. 